7-4
MAGNETO TROUBLE SHOOTING
When the engine does
not
start
or
starts
with
difficulty,
or
when
its
operation is unstable, the
following
tests wiU clarify if they are caused
by
a defect
in
the magneto.
1)
Check ignition cable for possible corrosion, broken, worn insulator
or
loose connection.
2)
Check the sparking
as
described later
in
this
section.
3)
Check if the breaker points require cleaning,
or
adjusting
or
not.
If the points are badly
corroded or pitted. (Condenser may have
to
be replaced.)
Refer to
"BREAKER POINT ADJUSTMENT".
4)
If
no
spark takes place, replace ignition coil.
*
SPARK
TESTING
Remove spark
plug
from
cylinder head and place it
on
blower housing, with the ignition cable
connected to it.
Crank the engine several times
by
starting pulley and observe the spark
in
the spark gap
of
spark plug.
If
the
spark
is
strong, the ignition system can be eliminated as the source
of
trouble.
If
the spark is weak or there is
no
spark at
all,
repeat the checks according to the procedures
1)
through
3)
above.
The
correct electrode gap
is
0.6
Q
0.7
mm
(0.024
%
0.028
inch).
-31
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